Note 7 - Share-based Compensation (Details Textual) - Restricted Stock [Member] - USD ($) |
3 Months Ended | |
---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
|
Non-Employee Directors [Member] | ||
Allocated Share-based Compensation Expense | $ 53,000 | $ 30,000 |
Management [Member] | ||
Allocated Share-based Compensation Expense | $ 380,000 | $ 549,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |